CN102912076B - A method for preventing scaling of vanadium extraction converter dry dust removal pipeline - Google Patents
A method for preventing scaling of vanadium extraction converter dry dust removal pipeline Download PDFInfo
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- CN102912076B CN102912076B CN201210442401.3A CN201210442401A CN102912076B CN 102912076 B CN102912076 B CN 102912076B CN 201210442401 A CN201210442401 A CN 201210442401A CN 102912076 B CN102912076 B CN 102912076B
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- evaporative cooler
- dry
- vanadium extraction
- blowing
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- 238000000034 method Methods 0.000 title claims abstract description 59
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 43
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000000428 dust Substances 0.000 title claims abstract description 22
- 238000000605 extraction Methods 0.000 title claims abstract 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007664 blowing Methods 0.000 claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003546 flue gas Substances 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000003723 Smelting Methods 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000012717 electrostatic precipitator Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明提供了一种防止提钒转炉干法除尘管道结垢的方法。所述方法包括：在向提钒转炉中兑入铁水的过程中，将干法除尘系统中的蒸发冷却器的淋水量控制在10～20m3/h，将干法除尘系统中的风机转速控制在250～350rpm；吹炼开始后，将所述蒸发冷却器的淋水量控制在20～30m3/h，将所述风机的转速控制在400～500rpm；吹炼后期，将所述蒸发冷却器的淋水量控制在25～40m3/h，将所述风机的转速控制在450～500rpm；并且在提钒转炉的整个冶炼过程中，将所述蒸发冷却器的出口烟气温度控制在130～380℃。本发明能够有效地避免提钒转炉干法除尘系统管道结垢的难题，从而大大减轻了设备处理时间，提高了设备保障能力。The invention provides a method for preventing fouling of the dry dust removal pipeline of the vanadium extraction converter. The method includes: during the process of adding molten iron to the vanadium extraction converter, controlling the spraying water volume of the evaporative cooler in the dry dedusting system to 10-20m 3 /h, and controlling the speed of the fan in the dry dedusting system at 250-350rpm; after blowing starts, the spraying water volume of the evaporative cooler is controlled at 20-30m 3 /h, and the speed of the fan is controlled at 400-500rpm; in the later stage of blowing, the evaporative cooler The amount of spraying water is controlled at 25-40m 3 /h, and the speed of the fan is controlled at 450-500rpm; and during the entire smelting process of the vanadium extraction converter, the outlet flue gas temperature of the evaporative cooler is controlled at 130- 380°C. The invention can effectively avoid the problem of fouling in the pipeline of the dry dedusting system of the vanadium extraction converter, thereby greatly reducing the equipment processing time and improving the equipment support capability.
Description
Technical field
The present invention relates to converter extracting vanadium dry dedusting technology field, more particularly, relate to a kind of method of the dry method dust pipeline scale that can prevent converter extracting vanadium.
Background technology
The traditional wet dedusting technology (OG method) of the many employings of the existing converter coal gas purification of China and recovery system, automatic control level and coal-gas recovering amount are all lower, and the dust content of gas after purification still reaches 100mg/m
3, recovery system energy consumption is larger, and the ton steel process energy consumption of converter steelmaking is 23.6kg mark coal.The initial stage sixties, by dry dust collection method of converter of German LURGI and the cooperative development of Thyssen steel mill, be called for short LT method, this method for dust removal started to apply the beginning of the eighties; The ultimate principle of converter dry dedusting technology is the high-temperature flue gas after gasification cooling flue to be sprayed water cooling, flue-gas temperature is reduced to 200 ℃ of left and right by 900 ℃～1000 ℃, then adopts electric precipitator to process.Converter dry dust-removal system mainly comprises: gasification cooling flue, evaporative cooler (EC), electrostatic precipitator (EP), coal gas switching station, gas cooler (GC), diffusion system, ash-transmission system etc.
Fig. 1 shows an example of converter extracting vanadium dry-dedusting system of the prior art.As described in Figure 1, converter extracting vanadium dry-dedusting system comprises: movable gas hood 2, gasification cooling flue 3, evaporative cooler 4, electrostatic precipitator 5, blower fan 6, chimney 7, cup valve 8, gas cooler 9, gas chamber 10, water coolant 11, dust collection 12 and the high pressure steam 13 etc. that are arranged on the top of converter extracting vanadium 1.In the prior art, dry dedusting technology ton steel dust content of gas can reach 10mg/m
3, steel-making ton steel process energy consumption is only for below 10kg mark coal.Therefore, converter gas dry dedusting technology is acknowledged as the developing direction of metallurgical dust-removal system from now on.But in the prior art, the dry-dedusting system of converter extracting vanadium exists a difficult problem for pipeline scale, for example, its pipeline cleaning time is to clear up once for every 3 days conventionally.
In existing patent documentation, the Chinese patent application that publication number is CN102344987A has openly disclosed flue gas dry-process dust removing process of a kind of converter extracting vanadium; Publication number is that the Chinese patent application of CN101570808A has openly disclosed a kind of converter gas dry-dedusting system and explosion-proof equipment thereof; Publication number is that the Chinese patent application of CN102010928A has openly disclosed a kind of blowing of the converter oxygen gun based on dry dedusting technology control method; Publication number is that the Chinese patent application of CN101892343A has openly disclosed a kind of converter gas dry-dedusting system and using method thereof; Publication number is a kind of method that the Chinese patent application of CN101619375A has openly disclosed preventing electric precipitation detonation discharge of top and bottom blown converter.But these Patent Application Publications are all mainly concentrated and have been set forth the using method of dry-dedusting system or how to have prevented coal gas venting of dust explosion (CO, H
2), all unexposed for the method that how to prevent converter extracting vanadium dry method dust pipeline scale.
Summary of the invention
For at least one in prior art above shortcomings, one of object of the present invention is to provide a kind of method of the dry method dust pipeline scale that can prevent converter extracting vanadium.
The invention provides a kind of method that prevents converter extracting vanadium dry method dust pipeline scale, said method comprising the steps of: being blended in the process of molten iron, the trickle amount of the evaporative cooler in dry-dedusting system is controlled to 10～20m in converter extracting vanadium
3/ h, is controlled at 250～350rpm by the rotation speed of fan in dry-dedusting system; After blowing starts, the trickle amount of described evaporative cooler is controlled to 20～30m
3/ h, is controlled at 400～500rpm by the rotating speed of described blower fan; In the blowing later stage, the trickle amount of described evaporative cooler is controlled to 25～40m
3/ h, is controlled at 450～500rpm by the rotating speed of described blower fan; And in the whole smelting process of converter extracting vanadium, the exit gas temperature of described evaporative cooler is controlled to 130～380 ℃.
In a preferred exemplary embodiment of the present invention, be blended in molten iron step described, the trickle amount of evaporative cooler is controlled to 13～17m
3/ h, is controlled at 280～320rpm by rotation speed of fan.
In a preferred exemplary embodiment of the present invention, in the step starting in described blowing, the trickle amount of evaporative cooler is controlled to 23～27m
3/ h, is controlled at 430～470rpm by the rotating speed of blower fan.
In a preferred exemplary embodiment of the present invention, in the step in described blowing later stage, the trickle amount of evaporative cooler is controlled to 30～35m
3/ h, is controlled at 465～485rpm by the rotating speed of blower fan.
In a preferred exemplary embodiment of the present invention, in the whole smelting process of converter extracting vanadium, the exit gas temperature of evaporative cooler is controlled to 200～300 ℃.
Compared with prior art, beneficial effect of the present invention comprises: can alleviate pipeline scale, reduce the device processes time, save the production time etc., can alleviate labor strength, for enterprise is cost-saving, increase benefit simultaneously.
Accompanying drawing explanation
Fig. 1 shows the structural representation of converter extracting vanadium dry-dedusting system of the prior art.
Embodiment
Hereinafter, describe the method that prevents converter extracting vanadium dry method dust pipeline scale of the present invention in detail in connection with exemplary embodiment.
In one exemplary embodiment of the present invention, converter extracting vanadium adopts and purifies and reclaim converter gas such as the dry-dedusting system of Fig. 1, the method that prevents converter extracting vanadium dry method dust pipeline scale comprises the following steps: being blended in converter extracting vanadium in the process of molten iron (referred to as converting iron process), the trickle amount of the evaporative cooler in dry-dedusting system is controlled to 10～20m
3/ h, is controlled at 250～350rpm by the rotation speed of fan in dry-dedusting system; After blowing starts, the trickle amount of evaporative cooler is controlled to 20～30m
3/ h, is controlled at 400～500rpm by the rotating speed of blower fan; In the blowing later stage, the trickle amount of evaporative cooler is controlled to 25～40m
3/ h, is controlled at 450～500rpm by the rotating speed of blower fan; And in the whole smelting process of converter extracting vanadium, the exit gas temperature of evaporative cooler is controlled to 130～380 ℃.Here, to start be the moment that oxygen blast starts in blowing; The blowing later stage can refer to time period of last 30% of total oxygen blow duration.For example, in the time that total oxygen blow duration is 5min, the blowing later stage can be for oxygen blast 3.5min be to time period that oxygen blast finishes.
In another exemplary embodiment of the present invention, being blended in molten iron step, preferably, the trickle amount of evaporative cooler is controlled to 13～17m
3/ h, and rotation speed of fan is controlled to 280～320rpm.Adopt the trickle weight range of this example and the reason of speed range to be, convert the flue-gas temperature producing during iron low, without flue gas being carried out to big yield cooling operation, kind of dust is large simultaneously, better flue under this rotation speed of fan.
In another exemplary embodiment of the present invention, in the step starting in blowing, preferably, the trickle amount of evaporative cooler is controlled to 23～27m
3/ h, and the rotating speed of blower fan is controlled to 430～470rpm.Adopt the trickle weight range of this example and the reason of speed range to be, the flue-gas temperature that produces between firm elementary period of blowing is also lower, but higher than converting during iron, needs to increase trickle amount to the flue gas operation of lowering the temperature, kind of dust decreases simultaneously, and therefore rotation speed of fan suitably improves.
In another exemplary embodiment of the present invention, in the step in blowing later stage, preferably, the trickle amount of evaporative cooler is controlled to 30～35m
3/ h, and the rotating speed of blower fan is controlled to 465～485rpm.Adopt the trickle weight range of this example and the reason of speed range to be, the flue-gas temperature that the blowing later stage produces is higher, needs large trickle amount to the flue gas operation of lower the temperature, and while kind of dust is lower, and therefore rotation speed of fan suitably improves.
In another exemplary embodiment of the present invention, in the whole smelting process of converter extracting vanadium, preferably, the exit gas temperature of evaporative cooler is controlled to 200～300 ℃.
In order to understand better above-mentioned exemplary embodiment of the present invention, below in conjunction with concrete example, it is further described.
Example 1
Certain 200t of company converter extracting vanadium adopts the flue gas (wherein, contain particle minimum dust granules and part metals iron powder) of dry-dedusting system (DDS) to converter extracting vanadium to process, and in use the fouling of evaporative cooler pipeline is serious.Adopt following methods: convert in iron process, the trickle amount of evaporative cooler is controlled to 18～20m
3/ h, is controlled at 300rpm by the rotating speed of blower fan; After blowing starts, the trickle amount of evaporative cooler is controlled to 25m
3/ h, is controlled at 450rpm by the rotating speed of blower fan; In the blowing later stage, the trickle amount of evaporative cooler is controlled to 27～30m
3/ h, is controlled at 480rpm by the rotating speed of blower fan; Whole smelting process, evaporative cooler exit gas temperature is controlled between 230～350 ℃.Other parameter of dry-dedusting system adopts conventional setting.In these cases, through long-term operation, find that the evaporative cooler pipeline clearance time of converter extracting vanadium dry-dedusting system can be extended for 20 days once.
Example 2
Certain 200t of company converter extracting vanadium adopts the flue gas (wherein, contain particle minimum dust granules and part metals iron powder) of dry-dedusting system (DDS) to converter extracting vanadium to process, and in use the fouling of evaporative cooler pipeline is serious.Adopt following methods: convert in iron process, the trickle amount of evaporative cooler is controlled to 14～16m
3/ h, is controlled at 310rpm by the rotating speed of blower fan; After blowing starts, the trickle amount of evaporative cooler is controlled to 27m
3/ h, is controlled at 460rpm by the rotating speed of blower fan; In the blowing later stage, the trickle amount of evaporative cooler is controlled to 32m
3/ h, is controlled at 470rpm by the rotating speed of blower fan; Whole smelting process, the exit gas temperature of evaporative cooler is controlled between 260～280 ℃.In these cases, through long-term operation, find that the evaporative cooler pipeline clearance time of converter extracting vanadium dry-dedusting system can be extended for 25 days once.
In sum, method of the present invention can be by controlling the trickle amount of evaporative cooler and the rotating speed of exit gas temperature and blower fan in dry-dedusting system, (for example effectively avoid a difficult problem for converter extracting vanadium dry-dedusting system pipeline scale, the pipeline cleaning time of converter extracting vanadium dry-dedusting system once can be extended to cleaning in every 20 days once by cleaning in original every 3 days), thereby greatly alleviate the device processes time, improved equipment guarantee ability.
Although described the present invention in conjunction with exemplary embodiment above, those of ordinary skills should be clear, in the case of not departing from the spirit and scope of claim, can carry out various modifications to above-described embodiment.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210442401.3A CN102912076B (en) | 2012-11-08 | 2012-11-08 | A method for preventing scaling of vanadium extraction converter dry dust removal pipeline |
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| CN201210442401.3A CN102912076B (en) | 2012-11-08 | 2012-11-08 | A method for preventing scaling of vanadium extraction converter dry dust removal pipeline |
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| CN102912076B true CN102912076B (en) | 2014-05-21 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103146874B (en) * | 2013-03-08 | 2015-03-04 | 中冶南方工程技术有限公司 | Method for controlling water jet capacity of once dry-method dedusting evaporation cooling tower in converter steelmaking |
| CN103589822B (en) * | 2013-12-02 | 2016-02-10 | 武钢集团昆明钢铁股份有限公司 | A kind of control method of converter dry dedusting outlet temperature for evaporation cooler |
| CN104388626B (en) * | 2014-10-31 | 2016-07-27 | 攀钢集团西昌钢钒有限公司 | The control method of the injection flow rate of vapotron in converter extracting vanadium dry-dedusting system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2679404Y (en) * | 2004-03-05 | 2005-02-16 | 济南风机厂 | Vane preventing dust and scaling |
| CN201020467Y (en) * | 2007-04-06 | 2008-02-13 | 天津市新业船务工程有限公司 | Descaling and antiscaling device for water pipe with dust-collecting, desulfurizing and slag-removing functions for boiler |
| CN101570808A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Converter gas dry dust removal system and its explosion-proof device |
| CN101619375A (en) * | 2009-08-07 | 2010-01-06 | 山西太钢不锈钢股份有限公司 | Method for preventing electric precipitation detonation discharge of top and bottom blown converter |
| CN102285723A (en) * | 2010-06-21 | 2011-12-21 | 北京市壹清利达水处理技术服务中心 | Dust deposition inhibitor for dedusting water system in steel plant |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5047875A (en) * | 1973-08-30 | 1975-04-28 | ||
| JPS63113729A (en) * | 1986-10-31 | 1988-05-18 | Toppan Printing Co Ltd | Ic card |
| JPH0741814A (en) * | 1993-07-30 | 1995-02-10 | Sumitomo Metal Ind Ltd | Converter waste gas treatment method |
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- 2012-11-08 CN CN201210442401.3A patent/CN102912076B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2679404Y (en) * | 2004-03-05 | 2005-02-16 | 济南风机厂 | Vane preventing dust and scaling |
| CN201020467Y (en) * | 2007-04-06 | 2008-02-13 | 天津市新业船务工程有限公司 | Descaling and antiscaling device for water pipe with dust-collecting, desulfurizing and slag-removing functions for boiler |
| CN101570808A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Converter gas dry dust removal system and its explosion-proof device |
| CN101619375A (en) * | 2009-08-07 | 2010-01-06 | 山西太钢不锈钢股份有限公司 | Method for preventing electric precipitation detonation discharge of top and bottom blown converter |
| CN102285723A (en) * | 2010-06-21 | 2011-12-21 | 北京市壹清利达水处理技术服务中心 | Dust deposition inhibitor for dedusting water system in steel plant |
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